This is one of those things where you can't really explain why it's funny, it just is. This is the story of a man who fell asleep whilst playing Eve Online and made a funny noise whilst sleeping.
See, I told you I couldn't explain why it was funny! Just watch it already!
I guess the closest thing is this: every group of friends has had that one moment where something completely random just cracks everyone up to the point where you can't even breathe you're laughing so hard. This is what this moment is. It's awesome.